Some basic concepts of chemistry

Question 1

Define chemistry

Answer 1

the branch of science that studies the properties , structure and reactions

Question 2

1) philosophers stone :

2) elexir of life :

Answer 2

1 convert the metal into gold

2 grant immortality

Question 3

chemistry developed in the form of–

Answer 3

alchemy and iatrochemistry in 1300-1600 ce

Question 4

other names of chemistry

Answer 4

rasayan shastra, rastantra, ras kriya, rasvidya

~ science of atoms and molecules
basic constituents are atoms and molecules

Question 5

glass objects were found in -

Answer 5

maski(si) hastinapur taxila in ni

Question 6

systematic excavations were found at__

Answer 6

mohenjodaro in sindh and harappa in punjab

Question 7

1 remains of glazed pottery have been found in_
2 which cement was used in construction work ? and it contains ?
3 harappans used which glass to make ornaments

Answer 7

1 mohenjodaro
2 gypsum ,, lime sand and traces of caco3
3 faience glass

Question 8

give the theory of acharya kanda

Answer 8

he formulated the theory of the very small indivisible particles which he named “parmanu”
~ he authored the text VAISESHIKA SUTRAS
~ all subs are aggregated form of smaller particles called atoms , which are eternal, indestructible, spherical, suprasensible and in motion in original state

Question 9

1 kautilyas arthashastra describes –

2 colours of ink were made of –

Answer 9

1 prod of salt from sea

2 chalk red lead and minimum

Question 10

sushrut samhita 
charak samhita 
rasopanishad
tamil texts 
rasaratnakar 
varahmihirs brihat samhita 
gandhayukli

Answer 10

1 importance of alkalis
2 knew how to prepare h2so4,hno3,oxides of cu,zn …etc.
3preparation of gunpowder
4 preparation of fireworks
5 formation of mercury compounds
6 perfumes and cosmetics
7 recipes for making scents, mouth freshners etc.

Question 11

who was the first proponent of atomic theory ?

Answer 11

acharya kanda born in 6000 bce known by the name kashyap

Question 12

the oldest ayurvedic epic of india and its description -

Answer 12

charaka samhita — treatment of diseases
~concept of reduction of sizeof metals –NANOTECHNOLOGY
~ use of bhasmas of metals used in ailment treatment
(bhasmas have nanparticles of metals )

Question 13

Name of the some drugs
1 used in cancer therapy
2 used for helping AIDS patient

Answer 13

1 cisplatin and taxol
2 AZT ( azidothymidine)

Question 14

difference betn the mixtures and pure substances

Answer 14

mixture combine in any ratio

pure subs combine in a fixed ratio !

Question 15

what are the two diff systems of measurement

give origin too!

Answer 15

english system and the metric system( france origin, based on decimal system )

Question 16

the international sys of unit was established by–

what is the cgpm (IMPORTANT )

Answer 16

11th general conference on weights and measure

~ cgpm is an inter-governmental orgn created by a diplamatic treaty known as METRE CONVENTION was signed in paris 1875

Question 17

1 define mass
2 define weight
3 define volume
~1 dm3=_cm3=_liter

Answer 17

1 amount of matter present in the object 
~ is constant 
2 force exerted by gravity on the obj 
~may vary 
3 amount of space occupied by a subs
 ~1000 cm3  = 1 litre

Question 18

whats the use of volumetric flask
the fahrenheit scale is represented between –
formula of fahrenheit to celcius and of kelvin

Answer 18

prepare a volume solution

32C to 212C

Question 19

1 law of conservation of mass 
2 law of definite proportions 
3 law of multiple proportions 
4 gay luccas law of combinig volume 
5 avagadros law 
6 daltons atomic theory 

~ the first international conference was held on chem in -

Answer 19

1789
-
1803
1808
1811
1808

~ KARISRUHE,GERMANY

Question 20

mass of an atom of hydrogen –
mass of oxygen atom–
define molecular mass –

Answer 20

1.6736 * 10^-24 gram
15.995 amu
~ sum of atomic masses of the elements present in a molecule

Question 21

mass of a c12 atom determined by a — and found the value of —
avagrado constant was named after –
define molar mass

Answer 21

(1)mass spectroscope(2)1.992648 * 10^-23 gram
amedeo avagrado
~mass of a mole of a subs in grams

Question 22

the word STOICHIOMETRY was derived from

Answer 22

STIOCHEION – element

METRON–measure